Eye bending device



Jan, 22, 1946.

E. RoLDFgELD ETAL 2,393,364

vEYE BENDING DEVICE Filed May 27, 1944 2' sheetsshet 1 um A ...rv *.3 NEA .M 9 .WET .a O a ..J. RTM R 1.. NE 3 a l. 2 WB In \2. DO 55H l 1 l l l l l l I I l l |.l www1 Y, TIT B V ATToRNEYs.

R. GOLDFIELD ETAL Jan. z2, l1946,

EYE BENDING DEVICE 2 Sheets-Sheet 2 Filed May 27, 1944 BY y :This'inventionrelates to improvements inzaV machine 'for bending'eyes or loopsin the endsof stiff filaments, hereinafterreferredto 'generically' as wires. f. `/Au objectof the present nvention is to provide a. machine which will .quickly bend a substantially closed at loop in the-end of a 'stiff 4wire.` such as is 'often required forithe attachmentI of "electrical conductors to the usual binding post.. f f Among the objects of the present-invention are to provide av device which operatesvery quickl and which is substantially fool-proof.

` irAnother object of the 'invention isto'provide a device which is `readily adaptable for Vvarious diameters of wireand various diameters-of the loop formed in the end of thewire. l -I Still another object of the invention is to provide a' substantially'circularf loop in the end of ra wire'with means for centering the main portion of the wire adjacent the loopso that the main ment or iiatvcircular disc '2| which is preferably removably mounted on the gear` I 8 so that various elementszll may' be supplied. interchangeably for acting. .on wiresuof different diameter. To this end thediscZIl is provided with a, central post 22 havinga lower portioning 22a which fits slidably into a hole.23 inlthecenterof gear I8. The upper end 22bfof this post'extends above the upper surface of vdisc 2| andformsthe post about which the wireloop -is formed. Positioned radially 'outwardlypfrom centerpost 22v is a positioning or` driving pin 24 which engagesin a suitable opening 25 in disc 2| and thelower endof which also fits slidinglyinto a hole 2B in gear |8. AThus portion lies substantially ori/the extension of a diameter of the loop. f Y

Y Other objects and advantages of the invention will be apparent from the! accompanying VdrawingsY and specication, and the essential vkfeatures will lie-summarized in the appended claims. i

Fig.- lfisa side elevational View of a'device vfor carrying out our invention with parts broken away to more clearly show the construction; l

Fig. 2 is a top plan view ofthe deviceA of 'Fig-g 1- f showing the parts in position at the beginning of a loop-forming operation; f 'i l Fig. 3 is a View similar to12'fshowing the parts in position at the closeoff a'loop-forming operation; Y f' Y v Fig. 4 is a top plan view lof one ofthe interchangeable elements whichrotates 'while forming the loopin the end of awire; and

wFig. 5 is a sectional view of the? same :taken y along the une 5 5 of Fig. 4.

' It should be understood that the machineabout to be described may be operated by hand; byvfoot, or .by any usual source of power, the form here shown being for illustrative purposes only.

' In the deviceof Figs. 1, 2,"and=3, a shaft I0 is -f link |6-`is released. vFixed Vto the upper fen'd of shaft I0 so as to rotate with itis 'a gear I8.. This gear ,meshes with Vgear |9 which is rotatably mounted/atm -in'thehousing I.

Mountedv on top'flgearklv I8 is a rotatable elewhen disc 2| is dropped into position on gear I8 as `shownin Figs'. 1, .2,v and 3, the disc is firmly held for' rotation with the gear but at the ysame time i'slreadily removable for interchangeability. .-Meansis provided on disc 2| for gripping the extreme: endwof a'wirerso .as to carry the same aroundvpost'22b upon rotation of-gear lsand disc 22|-' The gripping means here shown comprises ahknifeedge 21a on a; block 21 which is fixed in'position onthe upper face of disc 2| as by means of suitable screws. or bolts 28.:` The knife edgeris directed toward the free end of wire 29 as best seen in Fig. 2 and, upon rotation of the disc V2| .in the direction: ofthe arrow shown in Fig. 2,' the: knife edge 21a slides toward the end of.A wire 29 until the rotating knife edge digs slightly into the'surface of the wire whereupon the end of the wire is carried around the post 22h-to' 'form' 'a loop/29a as shown in Fig. 3.

One of thej reasons for providing interchangeable discs 2| Vis to give the; proper clearance be- -v tweenlth'e postI 22h and the knife edge.21a.for

wiresofdifferent diameters.

Stop means is provided for limiting'the amount whichth-free 'end'29b of wire 29 extends beyond post 22h when the loop-forming operation begins. For this purpose,- stop member 30 is provided so arranged thatit 'is movedl out of the way after it has performed its function Vof'prop'erly locating the end 29h of a wire at the 4beginning of the loopforming operation." The stop member here shown comprises af plate suitably secured by screws or bolts 3| Vto `the hub |9a of gear I9. This plate extends radially outwardly from the axis of hub |9a and at its outerfend `has a flange 30a ybent downwardly so as to yjust clear the disc 2| and to provide an abutmentfor vthe wire end'29b.

its position shown inFig. 2 to its position shown inFig.3.-.-l; s

` Means is-provided for guiding the operator in I placing the. .wire 29 for a loop-forming operation. In thepresent instance, a platform 35 is built above-the top` surface of the housing to a pointV about level with the top surface,y of disc V2 l. y.Aty `the Aproper.point 'along this platform a recess or groove is formed by securing blocks 32 and 33 to the platform 3l. The vfacez33a of block 33 is substantially parallel to a line tangential to post 22h on the side thereof toward knife 21av in the position of the parts as shown in Fig. 2. This is so arranged that when the insulation of wire 29 is against the face 33a, the bare wire portion 29b is tangential to post 22h on the side thereof toward the knife edge.

Means is provided for insuring that disc 21.

does not leave its position on gear I8 except when it is desired to change discs. For this 'purpose, the end 32a of the block 32 is arranged 4to overlie, without touching, the edge of disc 2l as shownin the various views. Y

If 'a .loop were formed 4in theend of a wire :by means of the apparatus 'thus far described, .it would be a satisfactory loop for some purposes. However, Ain vmaking electrical connections, `it :is often rdesirable and makes a neater 4looking ,'job., if the main portion of the wire 21,9 is centered-with reference to the circular loop 29a. Ourimproved device provides means for so centering the :main portion of -the Wire. To the gear hub I-Sais xed an arm 34 fpreferably underneath -thestopmember 30 and secured by the same screws 31|." l'At the outer end of this arm is Icarried a downwardly extending pin 31a which is carried by rotation of `gear i9 counter-clockwise as viewed in Figs. 2 and 3 during a loop-forming operation, from the position of Fig. 2 to the position 1of Fig 3. It will be noted in Fig.V 3 that pin 434a :has moved to a position where it forces :the main portion of :Wire 28 adjacent the end of the loop 29a to such aposition that the main Aportion of the wire lies on an-extension of the diameter A of the circular loop 29a. At the-same time this action of ,pin 34a on the Wire substantiallycloses the loop 29a, This completes the bendingoperation', and upon release of link I6 vthe spring :I1 returns the parts to the position of Fig. 2 whereupon the loop 29a rmay be lifted off the post -22b and another wire inserted fora like operation.

A number of discs 2| may be kepton hand having suitable spacings between post.22b and 'knife edge 21a to accommodate Wires of different/diameters, and these discs Aare easily interchangeable by removing the screws which hold `block `32 on platform 3i and moving the stop member 30 out of the way. Also, 'various post'sizes L221) Amay be provided for loops of different diameters.

We have applied power means to our device vby substituting a pinion for the beveled gear I2 and meshing the same with a .poWer-drivenrack, but, obviously, Various means for driving the machine may be provided Without departing from the scope of our invention.

What We claim is:

l. A wire bending device comprising a rotatable element, a post positioned axially of said element, a stop member spaced from said post for positioning the end of a wire `lying on said element and substantially touching said post, a gripping member rigidly mounted on saidfelement spaced from said post by'more than the :diameter of saidvWi-re, said gripping member having asharp edge facing toward the end of .said wire, and means lfor rotating said .element in a direction to cause said gripping member edge to seize said wire and to carry the end thereof around saidpost forming a loop in the end of saidwire.

2. The combination of claim 1 including means operative when said gripping member has carried the end -o'f `said wire a major portionof 4the way'around s'aid vpost 'for engaging'the :portion of said wire near said loop and moving the same toward said free end of said wire and more nearly closing the loop.

.3. A wire bending device comprising a rotatable element, a post positioned axially of said element, a `stop .member spaced from said post for posivtioning the end of a wire lying on said element and 'substantially Atouching said post, a gripping member rigidly mounted on said element spaced .from said post 'by more than the diameter of said Wire, said gripping member having a sharp edge facing toward `the end of said Wire, and means -for rotating said element in a direction to cause said gripping member edge to seize said wire and to lcarry the end thereof around said post vvforming a loop in the endr of said wire, said last named means including a rotatable gear beneath said element and interengaging formations on:said gear and elementspaced from the center of `said .gear and providing fa positive drive betweenvsaid gear andelement.

4. yIn a device for forming a loop in the free end of `a Wire, ia Irotatable fgear,a disc on the upf per face Aof vsaid gear, a central post upstanding from :said disc, knife-edge means on said disc spaced from said post by little more than the diameter-ofv a wire positioned'tangentially of said post, 4the knife `edge of said last named meansv being inclined toward the free end of said Wire, stop means adjacentsaid post t0 limit the movement fof the free `end .of said,y wire beyond said post, means for rotating saidgear, -a pinion meshing rwith said gear, and said 'stop means being carried by said pin-ion, whereby rotation of said gear and pinion carries said stopvmeans away from the end o-f said wire.

5. -In La device Ifor `forming la :loop in the -free end Aof a wire, a rotatable gear, a disc on the upper face .of said gear, a central post upstand-ing from said vdisc, Aknife-edge means -on said disc spaced from said post by little morerthan the diameter-of a wire positioned tangentially Vof said post, the knife edge of said elast vnamed means beinginclined toward the free vend of said wire, stop means adjacent -said post to limit the movement Yof .the -free fend of said wire beyond said post, means for rotating said gear, said disc setting on said gear, -interengaging post and recess :means provided centrally of Vsaid. -disc and gear, and coacting post and recess means eccentric `of -said `disc and gear for driving -said disc by rotationofsaid gear.

6. In a device r.for forming a loop inthe -free end Aof -a wire, fa rotatable gear,.a disc on the upper face of said gear, a centralpost Yupstanding from said disc, knife-edgegmeans Aon =said disc spaced `from vsaid post by little more than the diameter of a Wire positioned tangentially of said post, the knife edge of -said last named means being inclineditoward the free end .of said wire, stop means adjacent'said'post to limit the movement of the .-free end --of said wire vbeyond `said post, means :for rotating said gear, a pinionmeshingw-ith said gear, `an armfcarried by said pinion, and a pin onsaid `arm in position to'engage vsaid wire at the base of said loop when rotation of said 'gea-r .has caused :said knife-edge means to carry Athe free -end of said Awire substantially around Vsaid post, :said ,pin `rbeing moved -by said arm-to position where lit causes the :main portion of said wire :to lie substantially on the extension ofadiameter ofvsaid post.

Y fRM-GOLDFIELD.,

ROBERT J. STAY-a.- 

